Milk-testing apparatus.



ALFAITBLOWITZ.

MILK TESTING APPARATUS.

APPLIOATION FILED mma, 1912.

1,059,289. Patented Apr. 15,1913.

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; UNrrnsTATns Param* orrron. i

the following is a specification.`

My invention relates to milk-testing apparatus particularly adapted for determin;

ingthe freshnessand purityof origin of milk, a dilute methylene iblue solution `being' used. As is well-knowmthetime required by a sample of milk `which has beenzmixed with methylene iblue to becomecolorless is measured with the aid of the apparatus.

According to my process I lworkwith a sample of milk which is only slightlyicolored with methylene blue and determine the time which such `a samplelrequires to become completely colorless, whereby a conclusion can be drawn asto the freshness of the milk. Inorderlto `be `ableexactly to determine theimoment when the milk `becomes colorless flasks havinga small vertical test-tube fused onlto the side have been known heretofore A` sample of the milk to be tested is putin its uncolore/tl state into this small test-tube, `while the milk mixed with methylene blue is poured into the flask itself. The two liquids whosecolors are to be compared are then beside one another, in order to determine the moment `ofi `the return of the colored` milk to the color `of.

the uncolored` milk.` This known apparatus has, however, certain defects.` Flrstly, it 1s difficult correctly to compare` the color .of l

the layer of milk `of small diameter in the small tube with? the layer of milkof larger 1 diameter in the flask. If themilk inithe side tube be compared iivith the layer of milk of approximately equal diameter inzthe neck i ofthe flask incorrect results are obtained because the cream` of the milk in theflask the color of the methylene `blue solution.

Specification of Letters Patent.` PatentedApl. 15, 1913.

Application filed March 8,i1912.

Serial No. 682,404.

The color i of the methylene blue solutionl first disappears in the cream.

A `primary object of my invention; is to 501 provide improved apparatus of the type de-` sc-ribedfor ltesting milk, `to which these `de-` fects are `not attached.` To this end, I make the .neckl of the milk flask both materially longer than; heretofore and of a `diameter equal to that of the small; side tube.

One illustrative embodiment of my inven-i tion is represented by way of example 1in part sectional elevation in the accompany` ing drawing.

Referring to the drawing, `my improved apparatus comprises a milk flask `@having` a longneck a of a diameter substantially equal to that of the tube b attached to `the side of the fiask, the said tube .having` no communication, however, with said flask.` l

The size of the `fiask containing the coli ored milk .is` of course selected so small that the cream risingout of this quantity of milk canfillonlya very smallportion of the long 170 tubular neck of the flask. It has been found that it is preferable toselect the size ofthe neck relatively tothe size ofthe remainder ofztheiflask so that the neck can contain more than J5 of the total cubic contents `of `75 the `remainder of the flask. In this manner it is possible to obviate the above-mentioned defects `and. always to` compare two layers of `milk having approximately the samediameter and` `approximately the same per-` centageof fat.

. 1. An apparatus foitesting milk byitlie methylene blue process .coiiipi'isiiig, incombination, a flask having an elongated tubu 85 I lar neck ,whose volumetric capacity` is equal to a considerable ifractionof that of the body of the flask, andia vertical test-tube of substantially the same diameter as said neck securedto said flask but devoid of communication `with `the same, said test-.tube being` disposed by the side of said neck.;

2. .An apparatus for testingmilk by the methylene blue process compr1s1ng, 1n` co1n- "same diameter' as said neck secured to saidl bination, a flask having an elongated tubu# Inv testimony whereof I have herennto seic'-` lar neclzwvhose volumetric capacity is more my hand in presence of twosubscribing wit-@l0 Y than one-fth that of the body of the flash nesses. y l

*and verticalI test-tube of substantially Vthe ARNOLD'FITELWIZ v flesh `:bue devoid of 'Communication with the i Witnesses;

same, Said test-tube being disposed Vhy the WOLDEMAR HAUPT,

side of said neck. v f HENRY HASPER@ l i. Gopieswof thispatent may `be obtained `for ve cents each, vby adihfessinsg,` the Commissioner of fIPatevnt`s, i

Washington,l D. C. f 

